ANS-C00 Interview Questions

If you are looking forward to ace the ANS-C00 interview then you must know that in order to ace an interview, you not only need to have technical knowledge but also the confidence and ability to portray the answers in the best possible manner. However, for your ease, we have brought for you the collection of the best possible and frequently asked ANS-C00 interview questions. So, before moving towards the questions, let’s take a brief of the exam.

The AWS Certified Advanced Networking – Specialty exam justifies your advanced technical skills, abilities, and experience in designing and implementing AWS with hybrid IT network architectures at scale. This exam is suitable for candidates to perform complicated networking tasks, and also assists in assuring the following abilities-

to design, develop, and deploy cloud-based solutions using AWS
implement core AWS services according to basic architecture best practices
to design and maintain network architecture for all AWS services
leverage tools to automate AWS networking tasks

Let’s get into the interview questions now.

What is Amazon CloudFront?

Amazon CloudFront is one of the most popular content delivery networks in the world because of its ability to accelerate the transmission of static and dynamic web content, like .html, .css, and .js files. CloudFront works quite efficiently with services like AWS Shield and helps in curbing DDoS attacks. It utilizes Amazon S3, Elastic Load Balancing, or Amazon EC2 as sources for your applications and also uses Lambda Edge to run custom code closer and personalize customer users.

What is AWS Cloud Trail?

AWS Cloud Trail enables monitoring of the calls made to the EventBridge API for your account, including the calls made by the AWS Management Console, the AWS CLI, and some other services. When CloudTrail logging is turned on, EventBridge writes log files to an S3 bucket. Each log file contains one or more records, depending on how many actions are performed in order to satisfy a request.

What does VPC stand for?

VPC stands for Virtual Private Cloud.

What is the use of VPC?

A VPC is one of the best ways to connect to cloud resources from one’s own data center. Once you connect your datacenter to the VPC in which your instances are present, each instance is assigned a private IP address that can be accessed from your data center. Thus, you can access your public cloud resources as if they were on your own private network.

What are the benefits of auto-scaling?

Auto-scaling has the following benefits:

Better availability
Good cost management
Better fault tolerance

What is AWS Lambda?

AWS Lambda is a compute service that allows you to run code in the AWS Cloud without provisioning or managing servers.

Describe the Lambda@Edge feature of Amazon.

Lambda@Edge is a feature of Amazon CloudFront that allows you to run code closer to users of your application, which helps in improving performance and reduces latency. You don’t have to provision or manage infrastructure in multiple locations worldwide with Lambda@Edge. You pay only for the compute time that you consume and not when your code is not running.

Name the interfaces used to create VPCs.

One can use the following interfaces to create and manage VPC:

AWS Management Console — This provides a web interface that one can use to access the VPCs.
Amazon SDKs — This provides language-specific APIs and takes care of many of the connection details, for example calculating signatures, handling request retries, and error handling.
AWS Command Line Interface — This provides commands for a broad set of AWS services, including Amazon VPC, and is supported on Windows, Mac, as well as Linux.
Query API — This provides low-level API actions that you call using HTTPS requests. One of the direct ways to access Amazon VPC is using Query API, but it requires that your application handle low-level details such as generating the hash to sign the request and error handling.

What is API? What are it’s uses?

API stands for Application Programming Interface. It has the following uses:

Eliminating the need to write fully-fledged programs.
Providing instructions to set up communication between one or more applications.
Allowing easy creation of applications and linking the cloud services with other systems.

What is Amazon EC2?

The Elastic Compute Cloud (Amazon EC2) is a web service that provides resizable compute capacity in the cloud. It has been designed so as to make web-scale cloud computing easier for software developers. Amazon EC2’s service interface allows the developers to obtain and hence configure capacity with minimal friction.

What are the features of Amazon EC2?

Some of the features of Amazon EC2 are:

Virtual computing environments called instances.
Multiple physical locations for your resources, such as instances and Amazon EBS volumes, called Regions and Availability Zones.
Various configurations of CPU, memory, storage, and networking capacity for your instances, called instance types.
Secure login information for your instances using key pairs.
Preconfigured templates for your instances, known as Amazon Machine Images (AMIs), that package the bits you need for your server.
Persistent storage volumes for your data using Amazon Elastic Block Store (Amazon EBS), called Amazon EBS volumes.
A firewall that enables you to specify the protocols, ports, and source IP ranges that can reach your instances using security groups.

What do you mean by DynamoDB?

DynamoDB is a NoSQL database service that provides necessary and fast performance. DynamoDB is superintendent and also offers a good level of scalability. It eliminates users’ worry about the configuration, hardware provisioning, throughput capacity, setup, replication, software patching, or cluster scaling. Thus, it helps users in offloading the scaling and also operating distributed databases to AWS.

What does AMI mean?

Amazon Machine Image(AMI) is a template that provides the information that is required to launch an instance, that is actually a copy of the AMI running as a virtual server in the cloud. Thus, one can launch instances from as many different AMIs as one wants.

What is the use of IAM?

AWS Identity and Access Management (IAM) helps in securely controlling access to AWS resources. IAM controls who can use your AWS resources, what resources can they use, and how can they use them i.e authorization.

What is Amazon Web Application Firewall?

AWS Web Application Firewall helps protect your web applications or APIs against common web exploits and bots which can affect the availability, compromise security, or consume excessive resources. Moreover, AWS WAF gives you control over how traffic reaches your applications as it enables you to create security rules that control bot traffic and block common attack patterns, for instance, SQL injection or cross-site scripting.

What is S3?

Amazon S3 is a storage for the Internet. It is a simple storage service that provides highly scalable, reliable, and low-latency data storage infrastructure to software developers infrastructure at very low costs. It also provides a simple web service interface to store and retrieve any amount of data, at any time, from anywhere.

Define Amazon Route 53?

Amazon Route 53 is a scalable and highly available Domain Name System. It is created for benefiting developers and companies to route end users to internet applications by the translation of names that is a very reliable and cost-effective process.

What is AWS Shield?

AWS Shield is a managed Distributed Denial of Service (DDoS) protection service that aims to safeguard applications that run on AWS. AWS Shield provides always-on detection and automatic inline mitigations that minimize application downtime and latency, therefore there is no need to engage AWS Support to benefit from DDoS protection.

How many tiers does AWS Shield has?

AWS Shield has two tiers- Standard and Advanced.

What does Elastic Load Balancing do?

Elastic Load Balancing on its own distributes incoming application traffic across multiple targets, such as Amazon EC2 instances, containers, IP addresses, Lambda functions, and virtual appliances. It is capable of handling the varying load of your application traffic in a single Availability Zone or across multiple Availability Zones. Elastic Load Balancing provides four types of load balancers that feature the high availability, automatic scaling, and robust security necessary to make the applications fault-tolerant.

Mention the benefits of Elastic Load Balancing.

Some of the benefits of Elastic Load Balancing are:

High availability
Elasticity
Security
Feature breadth
Strong monitoring
Integration and global reach

What are the principles of reliability in cloud?

Automatic recovery from failure: By monitoring a workload for key performance indicators, you can trigger automation when a threshold is breached. These KPIs must be a measure of business value. This allows for automatic notification and tracking of failures, and for automated recovery processes that work around or repair the failure. Hence, with more sophisticated automation, it’s possible to anticipate and remediate failures before they occur.
Scale horizontally to increase aggregate workload availability: Replace one large resource with multiple small resources so as to reduce the impact of a single failure on the overall workload. Distribute the requests across multiple, smaller resources in order to ensure that they don’t share a common point of failure.
Testing recovery procedures: In an on-premises environment, testing is often conducted to prove that the workload works in a particular scenario. Testing is not typically used to justify recovery strategies. In the cloud, you can test how your workload fails and can validate your recovery procedures. You can also use automation to simulate different failures or to recreate scenarios that had led to failures before. Therefore, this approach exposes failure pathways that you can test and fix before a real failure scenario occurs, thus decreasing risk.
Managing change in automation: Changes to your infrastructure must be made using automation. The changes that need to be managed include changes to the automation, which further can be tracked and reviewed.

Explain AWS Global Accelerator.

AWS Global Accelerator is basically a networking service that helps in improving the performance of your users’ traffic by up to 60% using Amazon Web Services’ global network infrastructure. AWS Global Accelerator optimizes the path to your application to keep packet loss, jitter, and latency consistently low at times when the internet is congested.

What does Amazon CloudWatch do?

Amazon CloudWatch is a monitoring service that is built for DevOps engineers, developers, site reliability engineers (SREs), and IT managers. CloudWatch offers data and actionable insights to monitor applications, respond to system-wide performance changes, optimize resource utilization, and get a unified view of operational health. Alongside it collects monitoring and operational data in the form of logs, metrics, and events, providing you with a unified view of AWS resources, applications, and services that run on AWS and on-premises servers.

Mention the key concepts of VPC.

Virtual private cloud (VPC)
VPC endpoint
Route table
Subnet
Internet gateway
CIDR block

What is AWS Direct Connect?

AWS Direct Connect is a cloud service solution that makes the establishment of a dedicated network connection from your premises to AWS really easy. You establish a private connection between AWS and your datacenter or colocation environment by using AWS Direct Connect. This can increase bandwidth throughput and provide a more consistent network experience than internet-based connections.

Name the scalar data types supported by DynamoDB?

The scalar datatypes that DynamoDB supports are:

Binary
Boolean
String
Number

What do you know about QLDB?

Amazon QLDB is a fully managed ledger database that offers a transparent, immutable, and cryptographically verifiable transaction log ‎owned by a central trusted authority. This can be used to track every application data change and also maintains a complete and verifiable history of the changes over time.

What is the role of AWS Transit Gateway?

AWS Transit Gateway’s role is to connect VPCs and on-premises networks through a central hub. This simplifies your network and puts an end to the complicated peering relationships. Hence, it acts as a cloud router – each new connection is made once only.

What are the advantages of Amazon CloudWatch?

Amazon CloudWatch has the following benefits:

Observability on a single platform across applications and infrastructure
Improves the operational performance and optimizes resources
Derives actionable insights from logs
Gets operational visibility and insight
The easiest way to collect metrics in AWS and on-premises